Trolley-wire support.



J. BRYAN.

TROLLEY WIRE SUPPORT. APPLICATION FIILEU JULY 2|; I913- LFQUQRQ. Patented Oct. 31,1916.

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JAMES BRYAN, OF PITTSBURGH, PENNSYLVANIA.

TROLLEY-WIRE SUPPORT.

rename.

Specification of Letters Patent.

Patented Get. 31, 1916.

Application filed July 21, 1913. Serial No. 780,225.

To all whom it may concern:

Be it known that 1, Jaime BRYAN, a subject of the King of Great Britain, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Trolleyire Supports, of which the following is a specification.

()ne object of this invention is to prevent lateral deflection of the conductor supports under pressure of the trolley wheel, particularly when rounding curves. The desired rigidity is obtained through the medium of a simple and highly etlicient truss which is preferably of inverted triangular or kingpost form, the conductor being secured to the truss at its downwardly disposed apex.

A. further object is to afford the conductor support limited vertical play on the insulators from which it is suspended, thereby adding an element of flexibility without interfering with the desired lateral rigidity.

A still further object of the invention is to provide efficient means for adjustably securing the truss strut or post to the truss members, either centrally thereof or nearer one end than the other, the strut connections being preferably so arranged that the truss may be tightened or collapsed by turning the strut in one direction or the other.

111 the accompanying drawings: Figure 1 is an elevation of the improved trolley wire support, the conductor sustaining clevice being arranged centrally of the truss; Fig. 3 is a similar view with the conductor support located at one side of the truss center; Fig. 2 is a detail of the truss strut and the fittings to which it is adjustably connected; and Fig. 4 is a view similar to Fig. 1, illustrating insulatorsof modified form.

Referring to the drawings, 2 designates a post from which projects the track-overhanging arm 3 which may be braced by rod 4 extending to the upper end of the post. Depending from arm 3 are hangers 5 which. in the embodiment shown in Figs. 1 and 3, are adapted to support the spool-shaped insulators 6. Hangers 5 are spaced apart a suitable distance on arm 3, and slidable on the vertical spool-like bodies 6' of the insulators is spanner 7 which forms a chord of an inverted triangular or king-post truss of which 8 is the Vertical strut, and 9 oppositely inclined chords, the latter being formed preferably of a single piece of wire with its extremities secured to chord 7 adjacgnt the opposite insulators, as indicated at The upper end of strut 8 is secured to chord or spanner 7 by a fitting 10 and its lower end is similarly secured to the chord 9 by the fitting 11. Chord or spanner 7 is threaded through an eye or passageway in fitting 10, and is kinked and secured therein by set screw 12. At the under side of fitting 10 is the internally threaded tubular extension 13 which receives the upper threaded end of strut 8. Chord 9 is threaded through fitting 11 and is kinked and confined thereon by stud bolt 14, entered through a depending internally threaded extension 15 of the fitting. The upper portion 16 of fitting 11 is internally screw-threaded to receive the lower extremity of strut 8.

The strut and its fittings may be located either centrally of the truss, as in Figs. 1 and a, or at one side of the center, as in Fig. 3, the side position being determined by the curvature of the track, and as the trolley wire or conductor C is secured to fitting 11 it will be seen that the position of the latter determines the position of the conductor relatively to the truss and the track. With the extremities of strut 8 oppositely threaded, it will be seen that rotation of the strut in one direction spreads and tightens the truss, while a reverse adjustment of the strut tends to contract and collapse the truss.

As will be seen, this general arrangement of members 7 and 9 and strut 8 is such as to practically form two triangles within the general triangular arrangement, the strut being common to both triangles. By reason of the form of connection of the strut with its members, the position of the strut is variable to one side or the other of a line truly bisecting the truss as an entirety, thus controlling the character and relation of the two triangles relative to each other, this being aided by the adjustability in the length of the strut provided by the opposite threading of the member 8.

Ear 17, secured to conductor C and by means of which it is held suspended, may be each arm having a series of apertures 19 whereby the pivotal connection of the insulators may be raised or lowered as desired. While this form of insulator may be substituted for that shown in Figs. 1' and 3, the truss support is of the same construction as that above described.

That I claim is 1. In a trolley wire support and in combination, a truss structure'comprising a pair of connected members and a strut, said members and strut being connected to produce a triangular truss formed of a pair of triangles with the strut common to both triangles, said strut being positionable to control the configuration of the triangles to each other.

2. In a trolley wire support and in combination, a triangular truss having its apex disposed downwardly and adapted to support the conductor, said truss comprising a pair of connected members and a strut, said strut and members completing a pair of triangles, said strut being positionable between said members to control the configura tion of the triangles relatively to each other.

3. In a trolley wire support and in combination, a triangular truss having its apex disposed downwardly and adapted to support the conductor, said truss comprising a pair of connected members and a strut, said strut and members completing a pair of triangles, said strut being positionable be tween said members to control the configuration of the triangles relatively to each other, said strut being adjustable in the direction of its length.

4. In a trolley wire support, the combination of separated insulators, insulator sustaining means, a spanner supported by the insulators, a conductor support dependent from and secured to the spanner, and a member forming opposed rigid bracings extending from the support to opposite ends of the spanner, said support forming the brace between the spanner and bracings.

5. In a trolley wire support, the combination of an inverted triangular truss having two of its chords in the form of a single member with the remaining chord in the form of another member, a strut for the truss adjustably connected at its upper and lower ends with the truss members for fixing the rigidity of the truss, the strut connections being adjustable relatively to the truss members, conductor sustaining means at the truss apex, and truss supporting means. I

6. In a trolley wire support, the combination of an inverted triangular truss having two of its chords in the form of a. single member with the remaining chord in the form of another member, a strut rotatably and adjustably secured to a chord of the truss and to the truss apex with the strut adapted to be rotated in one direction to expand the truss and increase its rigidity and when rotated in the opposite direction adapted to slacken the truss, the strut connections being adjustable relatively to the truss members, conductor supporting means at the truss apex, and truss sustaining means.

7. In a trolley wire support, the combination of a truss having two of its chords in the form of a single member with the remaining chord in the form of another member, alining fittings secured respectively to the truss members, a strut adjustably connecting with the fittings for varying the rigidity of the truss, the strut connections being adjustable relatively to the truss members, a conductor support, and truss sustaining means.

8. In a trolley wire support, the combination of an inverted triangular truss having two of its chords in the form of a single member with the remaining chords in the form of another member, a fitting formed with a passageway through which a member of the truss extends, means for holding the fitting fixed adjustably on the member, a fitting at the truss apex formed with a passageway through which the other truss member extends, means for fixing said fitting adjustably on the member, a strut adjustably interposed between and secured to said fittings, a conductor support at the truss apex, and truss sustaining means.

9. In a trolley wire support, the combination of separated insulators, insulator sustaining means, and a conductor support sustained by and slidable vertically on the insulators.

10. In a trolley wire support, the combination of separated insulators each formed with a vertical slideway, insulator sustaining means, and a conductor support sustained by the insulators and movable vertically in the slideways thereof.

11. In a trolley wire support, the combination of separated insulators, insulator sustaining means, a spanner secured to and having limited vertical movement on the insulators, a conductor support secured to and spaced downwardly from the spanner, and opposed bracings extending upwardly from the support in opposite directions and secured to the spanner.

. 12. In a trolley wire support, the combination of two truss members combinedly providing the several chords of a triangular truss, with the truss apex disposed downwardly and adapted to support a conductor. and means secured to and interposed between said members for providing the truss apex, said means being adjustable in the direction of length of the members.

' 13. In a trolley wire support, the combination 'of two truss members 'combinedly providing the several chords of a triangular nation of separated insulators, insulatorsustaining means, and a conductor-supporting triangular truss sustained by and slidable vertically as a unit on the insulators.

In testimony whereof I aflix my signature 15 in presence of two Witnesses.

JAMES BRYAN. [1 s.]' WVitnesses:

F. E. GArrI-IER,

LOIS WINEMAN.

temples of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. 0. I 

